Docs: Improve releasing notes
Translations: update from Pootle.locamotion.org
Docs: remove completed work from roadmap
Docs: 2.5.1-rc1 release notes and related changes
Bump version to 2.5.1-rc1
Docs: point to depcheck
Bump up minimum versions
Docs: review README
Update requirements files

Still not sure why we have these?